package zio.http.endpoint.cli

import zio._
import zio.cli._
import zio.test.TestAspect._
import zio.test._

import zio.schema._

import zio.http.codec._
import zio.http.endpoint._
import zio.http.{Request, _}

/**
 * Test suite for Http CliApp. It tests:
 *   - CliEndpoint.fromEndpoint method
 *   - HttpCommands.addOptions method
 *   - Correct generation of commands
 *   - Correct behaviour of CliApp
 */

object CliSpec extends ZIOSpecDefault {

  val bodyCodec1 = ContentCodec.content[BigDecimal]("body1")

  val bodyCodec2 = ContentCodec.content[String]("body2")

  val bodyStream = ContentCodec.contentStream[BigInt]("bodyStream")

  val headerCodec = HttpCodec.headerAs[String]("header")

  val path1 = PathCodec.bool("path1")

  val path2 = PathCodec.string("path2")

  val path3 = path1 / path2

  val simpleEndpoint = Endpoint(Method.GET / path1).inCodec(bodyCodec1).inCodec(headerCodec)

  val multiformEndpoint = Endpoint(Method.POST / path2).inCodec(bodyCodec1).inCodec(bodyCodec2)

  val streamEndpoint = Endpoint(Method.PUT / path3).inCodec(bodyStream)

  val pathParamEndpoint =
    Endpoint(Method.DELETE / path1 / int("param1") / path2 / string("param2")).inCodec(bodyCodec1).inCodec(headerCodec)

  val endpoints = Chunk(simpleEndpoint, multiformEndpoint, streamEndpoint, pathParamEndpoint)

  val testClient: ZLayer[Any, Nothing, TestClient & Client] =
    ZLayer.scopedEnvironment {
      for {
        behavior         <- Ref.make[Routes[Any, Response]](Routes.empty)
        socketBehavior   <- Ref.make[WebSocketApp[Any]](WebSocketApp(Handler.unit))
        fallbackBehavior <- Ref.make[Handler[Any, Response, Request, Response]](
          handler((req: Request) => ZIO.logWarning(s"Unexpected request route: ${req}").as(Response.notFound)),
        )
        driver = TestClient(behavior, socketBehavior, fallbackBehavior)
        _ <- driver.addRoutes {
          Routes(
            Method.GET / "fromURL" -> handler(Response.text("342.76")),
            Method.GET / trailing  -> handler { (_: Path, request: Request) =>
              val headers = request.headers
              val body    = request.body
              if (headers.headOption.map(_.renderedValue).contains("fromURL"))
                ZIO.succeed(Response(Status.Ok, headers, body))
              else {
                for {
                  text <- body.asMultipartForm
                    .map(_.formData)
                    .map(_.map(_.stringValue.toString))
                    .map(_.toString())
                    .mapError(e => Response.error(Status.BadRequest, e.getMessage))
                } yield if (text == "Chunk(Some(342.76))") Response.text("received 1") else Response.text(text)
              }
            },
            Method.POST / trailing -> handler { (req: Request) =>
              val body = req.body
              for {
                text     <- body.asMultipartForm
                  .map(_.formData)
                  .map(_.map(_.stringValue.toString()))
                  .map(_.toString())
                  .mapError(e => Response.error(Status.BadRequest, e.getMessage))
                response <-
                  if (text == """Chunk(Some(342.76),Some("sample"))""") ZIO.succeed("received 2")
                  else ZIO.succeed(text)
              } yield Response.text(response)
            },
            Method.PUT / trailing  -> handler { (req: Request) =>
              val body = req.body
              for {
                text     <- body.asMultipartForm
                  .map(_.formData)
                  .map(_.map(_.stringValue.toString()))
                  .map(_.toString())
                  .mapError(e => Response.error(Status.BadRequest, e.getMessage))
                response <-
                  if (text == "Chunk(Some(342))") ZIO.succeed("received 3")
                  else ZIO.succeed(text)
              } yield Response.text(response)
            },
            Method.DELETE / "true" / int("param1") / "sampleText" / string("param2") -> handler {
              (param1: Int, param2: String, _: Request) =>
                for {
                  response <-
                    if (param1 == 1 && param2 == "param2value") ZIO.succeed("received 4")
                    else ZIO.succeed(s"$param1 $param2")
                } yield Response.text(response)
            },
            Method.ANY / trailing  -> handler(Response.text("not received")),
          )
        }
      } yield ZEnvironment[TestClient, Client](driver, ZClient.fromDriver(driver))
    }

  val cliApp: CliApp[Any, Throwable, Response] =
    HttpCliApp
      .fromEndpoints(
        "simple",
        "1.0.0",
        HelpDoc.Span.empty,
        endpoints,
        "localhost",
        0,
        client = CliZLayerClient(testClient),
      )
      .cliApp

  override def spec =
    suite("HttpCliSpec")(
      suite("GenTests")(
        test("fromEndpoint generates the correct CliEndpoint") {
          check(EndpointGen.anyCliEndpoint) { case CliRepr(endpoint, repr) =>
            assertTrue(endpoint == repr)
          }
        },
        test("CliEndpoint generates correct Options") {
          check(OptionsGen.anyCliEndpoint) { case CliRepr(options, repr) =>
            assertTrue(
              HttpCommand.addOptionsTo(repr).helpDoc.toPlaintext() == options.helpDoc.toPlaintext()
                && HttpCommand.addOptionsTo(repr).uid == options.uid,
            )
          }
        },
        test("fromEndpoints generates correct Command") {
          check(CommandGen.anyEndpoint) { case CliRepr(endpoint, helpDoc) =>
            val command = HttpCommand.fromEndpoints("cli", Chunk(endpoint), cliStyle = true)
            val a1      = command.helpDoc.toPlaintext().replace(Array(27, 91, 48, 109).map(_.toChar).mkString, "")
            val a2      = helpDoc.toPlaintext().replace(Array(27, 91, 48, 109).map(_.toChar).mkString, "")
            assertTrue(a1 == a2)
          }
        } @@ ignore, // TODO: evaluate if this is a good testing strategy.
        //  The generators seem to have to much fragile logic that breaks instead of revealing bugs
      ),
      suite("Correct behaviour of CliApp")(
        test("Simple endpoint") {
          for {
            response <- cliApp.run(List("get", "--path1", "--body1", "342.76", "--header", "header"))
            result   <- response match {
              case Some(r: Response) => r.body.asString
              case _                 => ZIO.succeed("wrong type")
            }
          } yield assertTrue(result == "received 1")
        },
        test("Multiform endpoint") {
          for {
            response <- cliApp.run(List("create", "--path2", "sampleText", "--body1", "342.76", "--body2", "sample"))
            result   <- response match {
              case Some(r: Response) => r.body.asString
              case _                 => ZIO.succeed("wrong type")
            }
          } yield assertTrue(result == "received 2")
        },
        test("Stream content endpoint") {
          for {
            response <- cliApp.run(List("update", "--path2", "sampleText", "--path1", "--bodyStream", "342"))
            result   <- response match {
              case Some(r: Response) => r.body.asString
              case _                 => ZIO.succeed("wrong type")
            }
          } yield assertTrue(result == "received 3")
        },
        test("Path param endpoint") {
          for {
            response <- cliApp.run(
              List(
                "delete",
                "--path1",
                "--path2",
                "sampleText",
                "--param1",
                "1",
                "--param2",
                "param2value",
                "--body1",
                "342.76",
                "--header",
                "header",
              ),
            )
            result   <- response match {
              case Some(r: Response) => r.body.asString
              case _                 => ZIO.succeed("wrong type")
            }
          } yield assertTrue(result == "received 4")
        },
        test("From URL") {
          for {
            response <- cliApp.run(List("get", "--header", "fromURL", "--u-body1", "/fromURL"))
            result   <- response match {
              case Some(r: Response) => ZIO.succeed(r)
              case _                 => ZIO.succeed(Response.text("wrong type"))
            }
            text     <- result.body.asString
          } yield assertTrue(text.contains("342.76"))
        },
      ) @@ sequential @@ withLiveClock,
    )
}
